What steps can I take to prevent encountering a Typescript Error (TS2345) within the StatePropertyAccessor of the Microsoft Bot Framework while setting a property?

Question

What steps can I take to prevent encountering a Typescript Error (TS2345) within the StatePropertyAccessor of the Microsoft Bot Framework while setting a property?

During the process of constructing a bot in Typescript, I encountered TS2345 error with Typescript version 3.7.2. This error is causing issues when attempting to create properties dynamically, even if they are undefined, or referencing them in the stateProperty accessor.

In the Javascript example, this functionality is achieved without any errors using the provided code snippet.

this.conversationDataAccessor = conversationState.createProperty(CONVERSATION_DATA_PROPERTY);
        this.userProfileAccessor = userState.createProperty(USER_PROFILE_PROPERTY);

        // The state management objects for the conversation and user state.
        this.conversationState = conversationState;
        this.userState = userState;

        this.onMessage(async (turnContext, next) => {
            // Get the state properties from the turn context.
            const userProfile = await this.userProfileAccessor.get(turnContext, {});
            const conversationData = await this.conversationDataAccessor.get(
                turnContext, { promptedForUserName: false });

            if (!userProfile.name) {

However, in Typescript, I am struggling to solve this error. While I can use the state property directly to attach the property, I am unsure about its accuracy and whether it is referring directly to the database, which in this case is an in-memory DB. Although it functions properly, I am uncertain if it's pointing to the correct object that should be accessing my state property accessor i.e.

const CONVERSATION_DATA_PROPERTY = 'conversationData';

Moreover, when I directly access the userState, which is Typed to BotState, it seems to persist through the turn context.

One more question arises - What type should I assign to the user state stateProperty accessor?

I currently have it set to UserState, but I am uncertain if it's correct. What should the userstate type be set as?

Here is the updated code example:

this.dialogState = this.conversationState.createProperty<DialogState>('DialogState');
this.userProfileAccessor = this.userState.createProperty<UserState>('UserState');

****Update per changes below

To address the information from the answer below, I have made the following changes.

In the index.ts file, I added 2 property accessors for the user profile and conversation data.

let userProfileAccessor: StatePropertyAccessor<UserProfile>;
let dialogDataAccessor: StatePropertyAccessor<DialogData>;

Following the state storage implementations, I included the property setters.

dialogDataAccessor = conversationState.createProperty<DialogData>(DIALOG_DATA_PROPERTY);
userProfileAccessor = userState.createProperty<UserProfile>(USER_PROFILE_PROPERTY);

I introduced the dialog data property|DialogData separately from the Dialog State property to allow individual access to properties separate from the dialogstate, which holds the dialogstack of the conversation state.

This approach also enables me to utilize a typed dialog StatePropertyAccessor, which is not possible with dialogstate alone.

javascript typescript botframework state

Answer 1

Answer №1

Avoid directly accessing UserState or DialogState using statements like

this.userState.x.y.z = 'myNewData'

, as it can lead to numerous issues. This is why we utilize the accessors.

While your code example at the end may be suitable for DialogState, it's not recommended for UserState. There are specific reasons for this.

In the index.ts file, creation of ConversationState and UserState classes occurs. These classes from the BotFramework SDK handle distinct tasks.

ConversationState separates different conversations in storage.
UserState isolates data for different users in storage.
These classes extend BotState, managing storage operations.
Direct manipulation on these classes should be avoided as the Bot Framework relies on their properties.

Your code snippet seems incorrect because:

this.userState.createProperty<UserState>('UserState');

This line instructs the bot to create an additional UserState object within an existing one. While it functions, TypeScript doesn't know what keys and values to store since UserState lacks defined properties.

You might encounter errors in TypeScript when using something like:

const userProfile = await this.userProfileAccessor.get(turnContext, {});
const conversationData = await this.conversationDataAccessor.get(
                turnContext, { promptedForUserName: false });

This is due to undeclared object types. You'd need to define types like:

export interface UserProfile {
    name: string;
    data: {
        age: number;
        location: string;
    }
}

[...]
this.userState.createProperty<UserProfile>('UserProfile');
const userProfile: UserProfile = await this.userProfileAccessor.get(turnContext, {});

Ensure consistency in naming conventions. For example, if you use createProperty('UserProfile'), name the variable userProfile when retrieving it. Also note that the 'UserProfile' string tells createProperty to create an object in UserState with the key name "UserProfile".

This explanation covers your concerns and offers solutions. Feel free to share more code in your question for further assistance if needed.

Answer 2

Avoid directly accessing UserState or DialogState using statements like

this.userState.x.y.z = 'myNewData'

, as it can lead to numerous issues. This is why we utilize the accessors.

While your code example at the end may be suitable for DialogState, it's not recommended for UserState. There are specific reasons for this.

In the index.ts file, creation of ConversationState and UserState classes occurs. These classes from the BotFramework SDK handle distinct tasks.

ConversationState separates different conversations in storage.
UserState isolates data for different users in storage.
These classes extend BotState, managing storage operations.
Direct manipulation on these classes should be avoided as the Bot Framework relies on their properties.

Your code snippet seems incorrect because:

this.userState.createProperty<UserState>('UserState');

This line instructs the bot to create an additional UserState object within an existing one. While it functions, TypeScript doesn't know what keys and values to store since UserState lacks defined properties.

You might encounter errors in TypeScript when using something like:

const userProfile = await this.userProfileAccessor.get(turnContext, {});
const conversationData = await this.conversationDataAccessor.get(
                turnContext, { promptedForUserName: false });

This is due to undeclared object types. You'd need to define types like:

export interface UserProfile {
    name: string;
    data: {
        age: number;
        location: string;
    }
}

[...]
this.userState.createProperty<UserProfile>('UserProfile');
const userProfile: UserProfile = await this.userProfileAccessor.get(turnContext, {});

Ensure consistency in naming conventions. For example, if you use createProperty('UserProfile'), name the variable userProfile when retrieving it. Also note that the 'UserProfile' string tells createProperty to create an object in UserState with the key name "UserProfile".

This explanation covers your concerns and offers solutions. Feel free to share more code in your question for further assistance if needed.

Answer 3

Answer №2

Were you able to test out the code provided above before encountering any errors?

// @ts-ignore

Answer 4

Were you able to test out the code provided above before encountering any errors?

// @ts-ignore

What steps can I take to prevent encountering a Typescript Error (TS2345) within the StatePropertyAccessor of the Microsoft Bot Framework while setting a property?

Answer №1

Answer №2

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